Fig. 3

Cytotoxicity of the urine from rats exposed to chlorpyrifos (CPF). Cell viability was determined using the MTT assay after the T24 cells were treated for different time by the urine prepared from the rats exposed to medium dose of CPF (3.26 mg/kg/day) (A), or treated for 48 h with the urine prepared from rats exposed to CPF at doses of 1.30 mg/kg/day (L), 3.26 mg/kg/day (M), and 8.15 mg/kg/day (H) respectively (B). ^*P < 0.05 and ^**P < 0.01, compared with the control